private static (Orthogonal_camera orthogonalCamera, Perspective_camera perspectiveCamera) GetBcfCameraValues(
this UIDocument uiDocument)
{
if (uiDocument.ActiveView is not View3D view3D)
{
return(null, null);
}
CameraType cameraType = view3D.IsPerspective ? CameraType.Perspective : CameraType.Orthogonal;
Position cameraPosition = uiDocument.GetCameraPosition(view3D.IsPerspective);
Vector3 center = cameraPosition.Center.ToMeters();
var cameraViewpoint = new iabi.BCF.APIObjects.V21.Point
{
X = Convert.ToSingle(center.X),
Y = Convert.ToSingle(center.Y),
Z = Convert.ToSingle(center.Z)
};
var cameraUpVector = new Direction
{
X = Convert.ToSingle(cameraPosition.Up.X),
Y = Convert.ToSingle(cameraPosition.Up.Y),
Z = Convert.ToSingle(cameraPosition.Up.Z)
};
var cameraDirection = new Direction
{
X = Convert.ToSingle(cameraPosition.Forward.X * -1),
Y = Convert.ToSingle(cameraPosition.Forward.Y * -1),
Z = Convert.ToSingle(cameraPosition.Forward.Z * -1)
};
Orthogonal_camera ortho = null;
Perspective_camera perspective = null;
switch (cameraType)
{
case CameraType.Perspective:
perspective = new Perspective_camera
{
Field_of_view = 45, // revit default value
Camera_direction = cameraDirection,
Camera_up_vector = cameraUpVector,
Camera_view_point = cameraViewpoint
};
break;
case CameraType.Orthogonal:
ortho = new Orthogonal_camera
{
View_to_world_scale = uiDocument.GetViewBoxHeight(),
Camera_direction = cameraDirection,
Camera_up_vector = cameraUpVector,
Camera_view_point = cameraViewpoint
};
break;
default:
throw new ArgumentOutOfRangeException(nameof(cameraType), cameraType, "invalid camera type");
}
return(ortho, perspective);
}